#include <stdio.h>
int main()
{
    printf("请输入年份:\n");
    int year;
    scanf("%d", &year);
    if (year % 4 == 0 && year % 100 != 0 && year % 400 != 0)
        printf("%d是闰年\n", year);
    else if (year % 400 == 0)
        printf("%d是世纪闰年\n", year);
    else
        printf("%d不是闰年\n", year);
    return 0;
}